An earthquake measuring 2.1 on the Richter scale was felt today on the island of Terceira, the Azores Center for Seismic Volcanic Information and Observation (CIVISA) reported.
According to CIVISA, the event was felt at 00:08 local time (1:08 Lisbon time), with its epicenter located approximately one kilometer north-northwest of Doze Ribeiras, in the municipality of Angra do Heroismo.
“According to the information currently available, an earthquake with a maximum intensity of III/IV (modified Mercalli scale) was felt in the parish of Serreta (municipality of Angra do Heroísmo, Terceira Island),” CIVISA said in a statement.
This event “is part of the ongoing seismic-volcanic crisis on the island of Terceira since June 2022.”
On the Richter scale, earthquakes are classified by magnitude into micro (less than 2.0), very small (2.0-2.9), small (3.0-3.9), weak (4.0-4.9), moderate (5.0-5.9), moderate (5.0-5.9), strong (6.0-6.9), large (7.0-7.9), important (8.0- 8.9), exceptional (9.0-9.9) and extreme (when above 10).
The Modified Mercalli Scale measures “degree of intensity and corresponding description.”
At intensity III, considered weak, the shock is felt inside the house and hanging objects sway, feeling “vibrations similar to those caused by the passage of heavy vehicles,” the Institute of the Sea and the Atmosphere (IPMA) said on its website.
At intensity IV, considered moderate, parked cars shake, windows, doors, and utensils shake, “glasses and utensils rattle or clank,” and walls or woodwork may creak.
Author: Lusa
Source: CM Jornal
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